Description

1,3-Isobenzofurandione,4-Ethynyl-(9Ci) is a specialized organic building block featuring a phthalic anhydride core functionalized with an ethynyl group. This compound matters as a versatile intermediate for synthesizing complex molecules, particularly in advanced materials and pharmaceutical research. It is needed by R&D chemists and process development scientists in the fine chemical, pharmaceutical, and material science industries for applications such as polymer modification and the synthesis of novel heterocyclic compounds. CAS number 646052-77-9 identifies this specific chemical entity.

Application

• Key intermediate in the synthesis of advanced pharmaceutical candidates and active ingredients.
• Building block for the development of novel polymers and high-performance materials with tailored properties.
• Precursor in organic synthesis for creating complex heterocyclic compounds and functionalized aromatic systems.
• Research chemical for academic and industrial R&D projects in medicinal chemistry and material science.
• Component in the development of specialty additives and performance chemicals.
• Starting material for synthesizing ligands and catalysts used in organic transformations.

Basic Information

Product Name	1,3-Isobenzofurandione,4-Ethynyl-(9Ci)
CAS No.	646052-77-9
Molecular Formula	C10H4O3
Molecular Weight	172.14 g/mol
Synonyms	4-Ethynylphthalic anhydride; 4-Ethynyl-1,3-isobenzofurandione; 4-Ethynylbenzene-1,2-dicarboxylic anhydride; 4-Ethynylphthalic acid anhydride; 1,3-Dioxoisobenzofuran-4-ylethyne; 4-Ethynyl-1,3-dihydroisobenzofuran-1,3-dione; 4-Ethynylisobenzofuran-1,3-dione
EINECS	Contact for details

Quality Control

Our 1,3-Isobenzofurandione,4-Ethynyl-(9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing specifications and test results is provided with every shipment to guarantee compliance with your research and development requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to exclude moisture. Keep away from incompatible materials such as strong bases and amines.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Melting Point	Contact for details
Loss on Drying	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.